Made details image scale from aspect fit to aspect fill upon loading.

This gets rid of the black bars which can result from aspect fit and provides visual cue to user that the image is draggable and pinchable.

Change-Id: I157f45a40d85fdfd515e75116dc1159e86dcb939
Increased login text boxes height. Tweaks to login autolayout.

Change-Id: I029bf3d488c12b416c09790cb633011f054de6d7